How do say no thanks!

[lifesfuckinggreat]

Long time poster, name changed.
I was seeing someone for a few months, I ended it in January.
He was a lovely guy, we had a laugh, he was kind and affectionate but his personal life was messy. He’d go days not messaging because he’d ’had other, more important stuff, going on’. I felt like I was so far down on his list of priorities, I might as well have not existed!
We have been in sporadic contact since but he messaged me this weekend asking if we could give us another go. Apparently all is sorted with his life now and future is looking good for him.
I am pleased for him but I’m not sure how to tell him that I’m not interested.
As I said, he was a great guy but the sex was a bit shit (this is the main reason for me not wanting to reconcile) and can’t really say that without hurting his feelings.
I’m not a nasty person and really want to let him down gently.
What do I say??

"Sorry, I've moved on" should do it.

Or... No I think Ive reached the same conclusion that we did in January. Personally i wouldn't mention the sex...

Be as bothered about his feelings as he was about yours when he told you he had other, more important things going on.

Just be upfront and honest. Tell him you don’t think he’s the one for you and that you have moved on.

ps don’t tell him he’s a great guy. I’ve had people say that to me in the past and it feels like a right kicker.

Just say your feelings haven’t changed since you last discussed it. Being direct and clear isn’t being nasty. There’s no need to tip toe around men though they’re big boys.

It’s not nasty to not want to date someone. How he handled the relationship sounds chaotic and immature

“That’s not going to work for me. But it was good to get to know you and I’m happy things have turned a corner for you”.

You ended it for good reason. You are under no obligation to give him another chance.

It's not nasty to tell him your decision is still the right decision for you regardless of what's going on in his life.

Don’t mention the sex, that’s just unnecessary. He messed you about and wasn’t ready.
I had someone like this and when he popped back up and wanted to get back together I just said sorry, you’re too late. If you didn’t know you wanted me when you had me, I’m not coming back to you now.
He was actually surprised that I said no. But then again I was clearly his rebound and he lied about how long he’d been separated from his wife so I wouldn’t go back to him whatever he’d said.
I also went back to someone who wasn’t ready the first time, and he still wasn’t ready. He just wasted more of my time before he worked that out. You’re doing the right thing however you word it.

"Glad life is looking up for you, but it's a No from me. That ship has sailed. All the best for the future."

Thank you all. Some good ideas.
I have now messaged him.
I was just finding it hard to articulate without being nasty.